M818 fuel gage stopped working-why?

[Autocar]

Gage was working fine on both tanks. Started the truck last week and the gage read empty on both tanks, even though they had plenty of fuel in them. I'm assuming the problem is in the gage selector switch or in the gage itself. Anyone have experience with this problem and where is the first place to look or troubleshoot?

 

[jasonjc]

where is the first place to look or troubleshoot?

The troubleshooting part of the TM!

 

[Autocar]

TM section is down.

 

[steelandcanvas]

This TM Section isn't down.
JATONKA's M809 series TM download page

 

[jasonjc]

The GOV site is up too. https://www.logsa.army.mil/etms/welcom1.cfm

 

[Floridianson]

Ground ?

 

[Westech]

People asking this questions over the net is like trying to do surgery over the phone.

ITS BROKE! Find out why.

 

[KsM715]

Ground ?

The guages are grounded to the panel by the brackets that hold them on. When you turn on the switch to the panel does the guage move at all, like it reads on empty? or does it stay bottmed out? (does that make sense?)

 

[doghead]

The military has been hounding SS too, we need to get the TM section up and running, they can't fix their trucks either.


You should have downloaded all the TMs pertaining to your truck, back when you joined.

It is so much faster and easier, when you have them all organized in folders, saved on your computer.

 

[Ferroequinologist]

Check the grounds to the tanks- and then check the power to the gauge. Then the switch. Then if all that is good, you've got a bad gauge. Those are what's likely to fail, in the easiest to do order.

 

[jwright]

The military has been hounding SS too, we need to get the TM section up and running, they can't fix their trucks either.

 

[Autocar]

My memory says that the gage just sits in the "off" position, with or without power turned on. I will check the gage ground first and then try some of the other suggestions here before going into a complete troubleshooting routine. Thank you to all of the guys who offered constructive help.